Machine for making sewing-needles.



W. BEHREN.

MACHINE FOR MAKING SEWING NEEDLES.

APPLICATION FILED FEES, 1912.

1,082,493. Patented Dec. 30, 1913.

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UNITED STATES PATENT OFFICE.

WALTHER BfiHREN, OF ISERLOHN, GERMANY, ASSIGNOR TO WILI-IELM POST, OF ISERLOI-IN, GERMANY.

MACHINE FOR MAKING SEWING-NEEDLES.

Application filed February 8, 1912.

Specification of Letters Patent.

To all whom it may concern:

Be it known that I, WALTHER Bt'IHRnN, a subject of the Emperor of Germany, residing at Iserlohn, Westphalia, Germany, have invented certain Improvements in Machlnes for Making Sewing-Needles, of which the following is a specification.

The present invention relates to a machine of the kind in which sewing-needles are continuously made from a wire which is intermittently fed through the machine.

The invention consists in the provision of a slide to which the complete stamping device for forming the eye-channels and the die for the eye-punch are connected, both within the distance of a needle length. The wire is gripped and fed by the jaws of the stamping device, the provision of separate grippers and feeders being thus obviated and a correct adjustment of the wire with reference to the tools being insured. The usual grinding rollers, for grinding the eyeportion of the needle, are carried by umversally movable shafts which are so arranged as to be operated by the punchplunger. This arrangement insures that the rollers are applied to and disengaged from the wire at the correct moments.

In the accompanying drawings the invention is illustrated, Figure 1 representing a side view, and Fig. 2, an end View of the machine. Fig. 3 is a cross-section of the casing for the punch-plunger, Fig. 4, a view of the punching device, the dies being shown in section, and Fig. 5, a plan of a device for securing the slide during the punching operation, Figs. 6 and 7 are views at right angles of the grinding device, and Fig. 8, a sectional view of the bearings for the grinding shafts.

The machine frame a is fitted with a guide-way b for the reception of a slide 0. This slide is reciprocated by an arm d which is mounted on a rock-shaft 1, the latter being in its turn operated by an arm 6 which is connected by a rod 2 to a crank fitted on a wheel f. The shaft 13 of the wheel f, which is rotated by toothed or other gearing, carries a cam 3 which supports a lever 9 through the medium of a rollercasing 4 connected to a pivoted arm The lever g is double-armed and is pivotally held between brackets 6 connected to the slide 0. The wire t is passed between the lever g and the slide 0 both of which elements are fitted with coacting dies 72. for forming the eye-channels on the wire. The lever has a tendency to hold the dies apart and is acted upon by the cam 3 for applying them to the wire, slide and lever being simultaneously advanced by the rock-shaft for feeding the Wire. To compensate for the wear of the elements, a wedge 9 is slidably connected to the lever 9 so as to take the thrust of the roller-casing 4. By means or clamp-screws 7, between which the rightangled end of the wedge is held on a screwspindle, the wedge can be adjusted for lowering its engaging surfaces relative to the lever.

One needle-length from the dies h a die Z is arranged on the slide for the reception of the punch Q by means of which the eyes are perforated. This die is formed with a grooved ridge for accommodating the wire as shown in section in vFig. 4. The aperture of the die communicates with a duct 1" through which the punched out portion is discharged. The punch q is connected to the end of a shank 8 which in its turn is connected to a plunger 12.. The latter is guided in a casing 12 and is reciprocated by the shaft 13 through the medium of any suitable known elements. Slidably arranged on the shank 8 is a die 7) which is similar in shape to the die Z and which is controlled by a helical spring 0 so as to be applied to the die Z and clamp the wire in position previous to the application thereto of the punch. During this operation the crank of the wheel f passes its dead center position and holds the slide at rest. For the purpose of arresting the slide 0 in its correct position, a latch to is provided which is slidable in a holder to and which is pressed wit-h its tapering end into engagement with a flared recess 3 on the slide previous to the operation of the punch. As soon as the punch is withdrawn the slide returns, the dies 71. being now disengaged from the wire so as to leave the latter in its advanced position. The wire will not be aifected by the slide during the return movement of the latter particularly since it is retained by the cutting device.

A grinding device is provided which consists of two grinding rollers 8 carried by shafts t. The latter are formed, about midway of their length, with a ball-shaped enlargement by means of which they are held in bearings 14 connected to the casing 12. The arrangement is such that the shafts can rotate about their axes and at the same time swing universally about the bearings 14. The lower ends of the shafts t are connected, by means of universal, longitudinally adjustable links 15, to shafts 16 and 20 which are held in bearings 1.8 secured to the machine frame a and which thus communicate their rotation to he shafts t and the rollers s. The shafts l6 and 20 are geared together by means of toothed wheels 17 and 19 and are rotated thrisugh the medium of a pulley 21 mounted on the shaft 16. The upper ends of the shafts are arranged at opposite sides of an actuating member 10 carried by a right-angled arm 11 connected to the plunger n. This actuating member has two inclined guide-surfaces wand 11 for rocking the shafts about the balls 14 in two directions. Thus, the surfaces a separate the upper ends of the shafts 2 and apply the rollers s to the wire when the plunger-is depressed. At the same time the surfaces a turn the shafts so as to cause the rollers s to move along the eye-portion of the wire in the traveling direction of the latter. hen the plunger returns to its normal position, the rollers are withdrawn from the wire so as not to interfere with its forward movement. A spring connects the upper ends of the shafts t and holds them in contact with the member 10. The wire is finally cut by a known cutting device, not

double-armed stamping lever pivoted to said slide, coacting dies on the slide and on one arm of the lever for forming the eye-channels on the wire, the latter being held between the dies, the lever being adapted to hold the dies normally apart, and a cam fitted on the crank-shaft so as to engage the lever and apply the dies to the wire while the slide is advanced by the crank and feed the wire simultaneously with the stamping.

2. In a machine for the cuitiiiiious manufacture of sewing needles out of a wire, a machine frame, a horizontally movable slide fitted in said frame, a crank shaft, connections between said shaft and the slide for reciprocating the latter, a double-armed lever pivoted to said slide and adapted to cooperate therewith for feeding the wire, a cam fitted on the crank shaft so as to engage the lever and apply the same to the wire while the slide is advanced and set it free while the slide returns, a punching device connected to the machine frame for making the eyes on the wire, and a die on the slide for supporting the wire against the punching device and receive the punch of the latter.

3. In a machine for the continuous manufacture of sewing needles out of a wire, a punching device for making the eyes on said wire, grinding rollers for grinding the wire about the eye portion after the punching, means for feeding the wire past the punching device and grinding rollers, universally movable shafts for operating said rollers, and connections between the punching device and said shafts for applying the rollers to one portion of the wire while the punch operates on another.

HELEN NUFER, ALBERT NUFER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, I). G. 

